case report...present illness zthis 63 y/o patient was admitted for workup of a right abdominal mass...
TRANSCRIPT
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Case ReportCase Report
Age: 63 years-oldGender: maleDate of admission:2000/1/14
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Chief complaintChief complaint
Incidental finding of a abdominal mass at the right renal area by sonography in the physical check-up.
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Present illnessPresent illness
This 63 y/o patient was admitted for workup of a right abdominal mass which discovered in sonography incidentally during a healthcheck-up.There was no other significant abnormal physical findings, and his blood pressure remained at 160/70mmHg
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Past historyPast history
Old CVA with lateral weakness in 1982Hyperlipidemia for years with regular medicationBPH diagnosed in Nov.1999
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Personal historyPersonal history
HTN:( + ) for more than 10 yearsDM: ( + )Smoking : ( + ) 1 ppd for yearsAlcohol : ( + ) herbal wines 30 cc for yearsAllergy : ( - )
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Physical examinationsPhysical examinations
Vital sign : body temperature: 36.6 Cpulse: 80/minrespiratory rate:14/ minblood pressure:160/70 mmHg
No other special findings in routine PE
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Lab dataLab data
Hb:15.1Hct:44.3RBC:9970Na:144K:3.9Epinephrine:4.52Norepinephrine:62.18Dopamine:312.08Cortisol:8.31/3.57
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Image studyImage study
Abdominal sonography showing a huge hyper-echogenicmass above the right kidney
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Image studyImage study
KUB: there are well visualization of the bilateral psoas line with no other particular findings
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Image studyImage studyAbdomen CT >a large, welldefined, fatty density massat the rightsuprarenal region
>No definitecontrast enhancement
Pre-contrast
Post-contrast
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Image studyImage study
Right renal angiography showed an avascular tumor above the right kidney with thin branched vessels
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Differential diagnosisDifferential diagnosis
MyelolipomaPheochromocytomaAdenomaAdenocarcinoma
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MyelolipomaMyelolipomaThe essential criteria for diagnosis of myelolipoma1. Hyperechogenic mass:
well demarcated inhomogeneous low-attenuation (-30 to -115HU) mass on CT
2. Relatively hypovascular tumor on angiography3. Detection and diagnosis of these lesions are based
on identification of fat density (CT)
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pheochromocytomapheochromocytoma
Pheochromocytoma is usually a very vascular tumor with arteriovenous lakes and early venous filling Angiography usually demonstrates a hypervascular mass with an intense capillary stain
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Adenoma and carcinomaAdenoma and carcinomaNonfunctioning cortical adenomas and carcinomas also appear as solid masses on CT. Adenomas are usually small (less than 3 cm in diameter) and are unilateral. Because of high lipid content, adenomas often have density measurements that approach that of water . This high lipid content can help distinguish adenomas from adrenal malignancies, which lack this material. In particular, unenhanced CT or CT obtained approximately 1 hour after contrast injection appears useful to help differentiate adenomas from malignancies.An unenhanced CT attenuation value of less than 18 HU and a 1-hour postcontrast value of less than 30 HU are strong predictors of adenomas. Carcinomas are usually larger than adenomas
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Impression: Myelolipoma of right adrenal gland
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Operative findingsOperative findings
An well capsulated mass between right kidney and liver was noted , adrenal gland was compressedThe tumor was excised carefullyMeasured 11.0*9.5*10cmYellowish-red , fragile
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Pathologic diagnosisPathologic diagnosis
Benign myelolipoma
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Final diagnosisFinal diagnosis
Giant adrenal myelolipoma
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DiscussionsDiscussionsAdrenal myelolipomas are rare, benign tumors consisting of mature fat and bone marrow elementsGiant adrenal myelolipomas as in our case are extremely rareBut have to be differentiated from more malignant entities, such as retroperitoneal liposarcomas or tumors arising from kidney
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TreatmentTreatmentUsually require no treatmentIf symptomatic or diagnosis in doubt, surgery is requiredDieckmann et al.1. small tumors-3 months interval follow-up 2. larger than 6 cm- surgical resection was
recommended for risks of spontaneous hemorrhage